About PrePersist
JPA Lifecycle Events
Explains how to use JPA lifecycle events (client side triggers) with callback methods and listener classes.... static class MyEntityWithCallbacks { @PrePersist javax.persistence.PrePersist JPA annotation Is used to specify callback methods for ...
JPA Annotations for Callback Methods
Reference (JavaDoc) of JPA 2 event callback and listener annotations, including @PrePersist(2), @PreRemove, @PreUpdate, @PostLoad, @PostPersist, @PostRemove and @PostUpdate.... as JPA callback methods: javax.persistence.PrePersist javax.persistence.PreRemove ...
@PrePersist not working correctly
I have a method to calculate some values before persisting to the database. So i annotated it with @PrePersist. If i merge an object the annotated method get's called but all members are on their default values. I only tried it with new objects. So merge get's an object with id = null and therefore shoud behave like persist. (I always use merge) If i set a breakpoint before the em.merge(..) call the object is ok. Inside the @PrePersist method all fields are cleared. ... persisting to the database. So i annotated it with @PrePersist . If i merge an object the annotated method get's called but ... the em.merge(..) call the object is ok. Inside the @PrePersist method all fields are cleared. ...
javax.persistence.PrePersist
Is used to specify callback methods for the corresponding lifecycle event.(Annotation of JPA)
2.3.3
... equivalent ORM XML ( issue #79 ). Fixed @PrePersist on merge to be called after merging fields ( issue #80 ). ...
Partial Indexing
I have a question about partial indexing. For example, a field of String type ttt, will be distinguished by the first 5 characters, then I can make a index of substr(ttt,1,5) in MySQL. With ObjectDB, how can I write the annotation for this purpose? TIA Institute of Computer Technologies ... callback method (which will be annotated with @PrePersist and @PreUpdate) . The new field should be indexed and used in ...
auto generate timestamp
Hi all, How can I create auto timestamping column? I want the database to generate the timestamp. I tried google but suggested solutions doesn't work in objectDB. http://stackoverflow.com/questions/811845/setting-a-jpa-timestamp-column-to-be-generated-by-the-database - Pawel ... field and update it in an event callback method ( @PrePersist , @PreUpdate ). ObjectDB Support ...
Bean Validation (JPA 2.0)
JPA 2 adds support for integration with the Bean Validation API. Constraints are added to entity and embeddable classes by annotations, and can be checked automatically on PrePersist, PreUpdate and PreRemove lifecycle events. Integration with the Validation API is currently not supported by ObjectDB.... by using annotations can be checked automatically on PrePersist, PreUpdate and PreRemove JPA lifecycle events. Integration with ...
2.3.4
... equivalent ORM XML ( issue #79 ). Fixed @PrePersist on merge to be called after merging fields ( issue #80 ). ...
2.3.5
... equivalent ORM XML ( issue #79 ). Fixed @PrePersist on merge to be called after merging fields ( issue #80 ). ...
